Dry cell.



Cx F. BURGESS.

DRY CELL.

APPLICATION FILED MAR. I5, I9I6.

Ra'ened Apr. 29, 1919 Zinc Il Tin FJ/ Y lllll'lllldlll STATES PATENT @Fwltllit CHARLES F. BURGESS, GE' MDISN, WISCONSIN, ASSIGNOR, IBYKMESNE ASSIGNMENTS, T0 BUBGESS BATTERY CMPALNY, 0F MADISON, WISCQNSIN, A CORPORATION 017 WISCONSIN.

DRY CELL.

monaca application ed Tri-[arch l5, w16.

To all whomI t may concern.'

Be it known that I, @Hennes F. BURonss, a citizen ot' the United States, residing 1n Madisom county of Dane, State of Wisconsin, have invented certain new and useful Improvements in Dry Cells; and I do here by declare the following to be a full, clear, and exact description or the invention, such as will enable others skilled in the art to which it appertains to make and use' the same.

ln the manufacture ot galvanic batteries of the type commonly called dry cells, it is customary to use a zinc electrode ot such shape that it may serve as a container for the other elements of the cell. The container is usually in the form of a tube closed at the bottom, both the tube and the bottom being of zinc.

l have discovered -that a highly satisfactor dry cell may be made by having a zine e ectrode With a tin bottom forming therewith a container for the other elements of the cell; and l here use the term tin, in a customary way, to include tinplate and terneplate.

The accompanying drawing is a sectional elevation of a dry cell constructed in accordance with my present inventionu The zinc electrode l is of tubular shape, as in common practice, and the bottom 2 is of tin punched from tinplate or terneplate and shaped with a flange to lit snugly within the zine tube Where it is soldered in place. The other elements of the cell may be of Speciileation of Letters Patent.

Patented tpra 20, 19119).

Serial No. @4,595.

usual' form and composition as shown in the drawmg, where 3 is the negative, carbon electrode, "l the pitch seal, 5 the gas reservoir, 6 the depolarizing mix of manganese dioxid, cin-oon and graphite and the salammoniac-zinc chlorid electrolyte, 7 the b-bulous envelop of blotting paper with a paper bottom 8, and 9 the usual tar paper disk covering the container bottom. This tar paper disk is semi-soluble in the zinc chlorid which forms part of the battery mixture and changes to a gunnny mass, as explained in U. S. Patent N o. 1,032,529, issued to Burgees and l-lambuechen, July 16, 1912. Even though the tinbe freely exposed to the e1ectrolyte, there is no harmful local action set up between the zinc and the tin.

The tin bot-tom gri yes to the cell relatively great strength; the tin is not subject to cracking during punching and shaping, is easy to solder in place and is cheaper than zinc. to live dollars per 1,000 cells of the standard size known to the trade as No. 6.

The cell of my present invention is ecient, durable, and of high grade and satisfactorily marketable as such;

l claim:

ln the dry cell a metal container exposed to the electrolyte, said container having zinc sides and a tin bottom and an electrolyte and cooperating electrode in said container.

ln testimony whereof l affix my signature.

CHARLES r. Bimenes.

By its use l effect a saving of four i 

